Assassin's Creed II Cheats

Unlockables

Assassin's Creed: Bloodlines Unlockable Weapons

Players may unlock bonus weapons by syncing save data from the Assassin's Creed: Bloodlines PSP game with Assassin's Creed II on the PS3. Connect the PSP to the PS3 via a USB cable, with BOTH games running. Then, select "Connectivity" from the Assassin's Creed II options menu, and "Connect to PS3" from Assassin's Creed: Bloodlines. The games will evaluate each others' save data and unlock in-game weapons and bonuses based on the player's progress. A complete story-mode playthrough of Assassin's Creed: Bloodlines will unlock six weapons that will be stored at the villa.

Easter Eggs

Giant Squid

In the assassin's tomb Santa Maria Delle Visitazione , before the room in which you get one of the seals required for the Armour of Altair , is a large room filled with water in where you go through an obstacle course . Now before attempting the course , activate the lever and stand on the edge of the floor and stare into the water . After waiting for about a minute , a large figure in the water appears to swim across while staring at you with what appears to be a yellow eye .
After the lever's time limit runs out , re activate it and stand on the same spot and wait . A giant tentacle will shoot out of the water that Ezio dodges at the last second .

Pivot Points

Pivot Points are special Collectibles that unlock once you successfully beat the Main Story, Pivot points unlock "cheats" in the Animus. Cheats can be accessed by pressing (Start -> Options -> Scroll Down to Animus Hack)

Secrets

Assassin Turkey

At any point beyond Sequence 6, return to the Davenport Homestead and, from the front door, walk around the right side of the manor and hide around the corner at the back. Whistle, and a turkey will appear nearby. Approach it and press up, up, down, down, left, right, left, right, O, X to feed it. This will result in the turkey donning an Assassin's hood and following Connor around.

Unlockables through Uplay

Sign in to Uplay from the Man Menu and select "Rewards". You can purchase goodies here using the points you earn for getting 4 different trophies in the Single Player game. They are:
Technical Difficulties
Perfectionist
Deja Vu
A knife to the heart